Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
thanh de » hanh de, thanh ve, thanh do
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, ma hoa, me hoi
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ky sang ((ma hoi) OR (xa hoi)). hieu van cam tuc van thanh de cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky sang ((ma hoi) OR (xa hoi)). hieu van cam tuc van thanh de cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ky sang ((ma hoi) OR (xa hoi)). hieu van cam tuc van thanh de cua viet*".